Adiantum argutum Splitg., Tijdschr. Natuurl. Gesch. Physiol.

Kessler, Michael, Smith, Alan R. & Prado, Jefferson, 2017, Prodromus of a fern flora for Bolivia. XXVII. Pteridaceae, Phytotaxa 332 (3), pp. 201-250 : 232

Adiantum argutum Splitg., Tijdschr. Natuurl. Gesch. Physiol. 7: 427, fig. 1–2. 1840.

Range: — Colombia to Guianas and Trinidad; Peru, Bolivia (BE, LP, PA, SC), and northern Brazil.

Ecology: —Very common, terrestrial in lowland forests; 100–550 m.

Notes: —For additional comments on characterization of this species, see Prado & Lellinger (2002). Related to A. obliquum , and more broadly to A. latifolium , A. petiolatum , and allies in the much larger A. tetraphyllum clade, similar to many of these in the long-creeping, often cord-like rhizomes. Twice-pinnate species are among the closest allies and are notable for having relatively few pinna-pairs. Differing from A. latifolium especially by the pinnules abaxially with setiform scales on veins, and margins of sterile pinnules conspicuously biserrate.